there needs to be a balance between the amount of energy you take in and the amount of energy that you expend, and we all need to move more, but we also need to control the amount of fat and sugar in our diet. professor snelling teaches at american university, undergraduate and graduate classes, on some of these topics that we have been covering this morning on the "washington journal." we have mentioned obesity rates a bit this morning. help us understand where we are. the two headlines that my confusion -- that might confuse viewers. a recent gallup poll -- u.s. obesity rates tick up to 27.1% in 2013. then here is a fox news story that says a new study shows a 43% job in obesity rates in young children ages 2 to 5. where are we really? guest: in the past 20 years, the obesity epidemic has been part of our culture. we are seeing certain age groups -- it is sad to think that we are talking about obesity rates in 2 to 5-year-old children. this is a preschooler. whether it is in a childcare setting or an apparent -- or in their parents' home. said it did by fox, drop, but we still have a